intransitive verb
Definition: To draw in something, usually liquid or air, through a mouth or similar opening; to make a sound caused by this action.
Example: The baby began to suck on its bottle eagerly.
noun
Definition: A thing that is drawn in by the action of pulling in with the mouth or a similar action.
Example: The baby made a loud suck as it fed from the bottle.
transitive verb
Definition: To pull liquid or air into the mouth or another space using the lips and tongue to create a vacuum effect.
Example: The baby learned to suck from the bottle quickly.